下面哪项是属于WHO口腔健康标准中的
A.牙列整齐B.牙齿洁白C.无牙龈萎缩D.牙龈颜色正常E.无缺失牙
参考答案:D
解析:只有牙龈颜色正常是WHO口腔健康标准的5点之一。
The organizing committee announces that tickets at the Grand Stadium are limited and will be _______ to those who apply first.
A.advocated
B.allocated
C.approved
D.acquired
简述媒介组织经营的主要内容。